2020-04-072020-04-072019-11-28ABRANCHES, Guilherme Araújo. Formulação alternativa do método de Newton-Raphson com modelo ZIP – testes e comparações. 2019. 21 f. Trabalho de Conclusão de Curso (Graduação) - Escola de Engenharia Elétrica, Mecânica e da Computação, Universidade Federal de Goiás, Goiânia, 2019.http://repositorio.bc.ufg.br/handle/ri/18985The formulation of the equations of the elements related to the main diagonal of the [N] and [L] sub-matrices of the Jacobian matrix of the Newton-Raphson method considering the ZIP load model presented in the technical literature of the load flow problem does not match the mathematical development of these equations. Based on this disagreement, this paper aims to propose an alternative formulation for the equations of the main diagonal elements of the [N] and [L] sub-matrices of the Newton-Raphson method with the ZIP load model. As a way of comparing the two formulations, it is adopted as performance criterion the number of iterations taken for the solution of the charge flow problem, with performance tests performed in electrical networks known in the technical literature: the 14-bar system, in this case in a version with modified load data to verify the accuracy of the results, as well as the 30-bar and 57-bar systems.VporAcesso AbertoSistemas de potênciaProblema do fluxo de cargaMétodo de Newton-RaphsonModelo de carga ZIPPower systemsLoad flow problemNewton-Raphson methodZIP load modelTCC